1. Institute on AgingCenter for Neurodegenerative Disease Research and Department of Pathology and LaboratoryUniversity of Pennsylvania School of MedicinePhiladelphiaPAUSA
2. Department of PathologyColumbia University College of Physicians and SurgeonsNew YorkNYUSA
3. Institute for the Study of AgingNew YorkNYUSA
4. National Institute of Neurological Disorders and StrokeNational Institutes of HealthBethesdaMDUSA
5. The Ohio State UniversityColumbusOHUSA